Minimal gauge origin of baryon triality and flavorful signatures at the LHC

Abstract

Baryon triality (B-3) is a Z(3) discrete symmetry that can protect the proton from decay. Although its realization does not require supersymmetry, it is particularly appealing in the supersymmetry as an alternative to the popular R-parity. We discuss the issues in gauging B-3, and present the minimal supersymmetric model with B-3 as the remnant discrete symmetry of a TeV scale U(1) gauge symmetry. A flavor-dependent U(1) charge is necessary to achieve this, and it results in very distinguishable and flavorful predictions for the LHC experiments. We find a complementarity between a 2-lepton sneutrino resonance and a 4-lepton Z' resonance in the supersymmetry search when a certain condition is satisfied. In addition, we introduce baryon tetrality (B-4), which would play an equivalent role if there are four fermion generations. (C) 2011 Elsevier B.V. All rights reserved.